Add python script to DFU from a linux PC to the Pinetime

bootloader/ota-dfu-python/unpacker.py

@@ -0,0 +1,52 @@
+import os.path
+import zipfile
+import tempfile
+import random
+import string
+import shutil
+import re
+
+from os.path  import basename
+
+class Unpacker(object):
+   #--------------------------------------------------------------------------
+   # 
+   #--------------------------------------------------------------------------
+   def entropy(self, length):
+       return ''.join(random.choice('abcdefghijklmnopqrstuvwxyz') for i in range (length))
+
+   #--------------------------------------------------------------------------
+   # 
+   #--------------------------------------------------------------------------
+   def unpack_zipfile(self, file):
+
+        if not os.path.isfile(file):
+            raise Exception("Error: file, not found!")
+
+        # Create unique working direction into which the zip file is expanded
+        self.unzip_dir = "{0}/{1}_{2}".format(tempfile.gettempdir(), os.path.splitext(basename(file))[0], self.entropy(6))
+
+        datfilename = ""
+        binfilename = ""
+
+        with zipfile.ZipFile(file, 'r') as zip:
+            files = [item.filename for item in zip.infolist()]
+            datfilename = [m.group(0) for f in files for m in [re.search('.*\.dat', f)] if m].pop()
+            binfilename = [m.group(0) for f in files for m in [re.search('.*\.bin', f)] if m].pop()
+
+            zip.extractall(r'{0}'.format(self.unzip_dir))
+
+        datfile = "{0}/{1}".format(self.unzip_dir, datfilename)
+        binfile = "{0}/{1}".format(self.unzip_dir, binfilename)
+
+        # print "DAT file: " + datfile
+        # print "BIN file: " + binfile
+
+        return binfile, datfile
+
+   #--------------------------------------------------------------------------
+   # 
+   #--------------------------------------------------------------------------
+   def delete(self):
+       # delete self.unzip_dir and its contents
+       shutil.rmtree(self.unzip_dir)